Short - coated breeds such as English bulldogs (FIGURE 5), Staffordshire terriers, and Boston terriers, along with longer - coated breeds such as shih tzus, West Highland White terriers, and Scottish terriers, seem to be predisposed.2, 4 In Chinese Shar - Peis, skin thickness may make finding the mites on a deep skin scraping difficult, and diagnosis may require obtaining skin biopsy samples for histopathology (see DIAGNOSIS).2, 4,5
Additional predisposing factors are listed in BOX 1.